If a Physician and a PA work together on a surgery, but the physician has left the room and left the PA to do the closure alone. Is there a code and or modifiers that will allow the PA to bill as primary for THAT particular code? (wound closure) Can you point me in the right direction or at least tell me that there is no such code/modifier. ( 80-82-AS)? How would we get maximum reimbursement for the PA in this case? I get the feeling that it's the 16% or even the 13.6%. Thanks for your help.